Coal screening and washing machine



I w-. F. MARTIN. COALSCREENING AND WASHING MACHINE. APPLICATION FILED MAY 18, I922. 1 438 125 v Patented Dec. 5, 1922.

3 SHEETS- SHEET I.

' vu mwfm W. F. MARTIN. COAL SCREENING AND WASHING' 'MA'CHINE. APPLICATION FILED MAY 18, I922. 1,438,125. Patented De0.-; 5-;1,922.

ssmnsi s'uam 2.

vwexnfoz ifigzwoo E W. F. MARTIN. .COAI. SCREENING AND WASHING MACHINE; APPLICATION FILED MAY 18, 1922.

Patnted Dec. 5,1922.-

, inclined as shown, a suitable screen 2 being Patented Dec. 5, 1922.

,WILLIAIM F. MARTIN, OE HARRISBURG, PENNSYLVANIA.

COAL SCREENING AND WASHING MACHINE.

Application filed. May 18,

do declare the following to be a full, clear,

and exact description of the invention, such as will enable others skilled 1n the art to which it appertains to make and use the same.

My invention relates to improvements in machines for washing and screening coal, ore and the like and has reference more particularly to machines of this character in which the waste material is washed by water through the screen into a plurality of collecting pockets beneath the latter. Such a machine is shown in my U. S. Patent No. 1 112291 issuedApril 11th, 1922, but the object of the present invention is to improve upon the construction of the patented machine, by providing novel means for agitating the water and waste material in the pockets, so as to prevent the latter from clogging as they were prone to do in the patented machine when screening certain kinds of material.

In carrying out the above end, a. further object is to provide a water wheel for operating the agitators, said water wheel be ing driven by the water discharged through the screen with the waste material.

WVith the foregoing in view, the invention resides in the novel subject matter;

hereinafter described and claimed, the description being supplemented by the accompanying drawings.

Figure 1 is a side proved machine.

Figure 2is a longitudinal sectional view. Figure 3 is a top plan view. I Figure 1 is a transverse sectional view as indicated by line 4- 1 of Fig. 2. Figure 5 is a longitudinal sectional view showing a different form of construction.

Figure 6 is a transverse section on line 6-6 of Fig. 5. i

Figures 7 and 8 are detail sectional views showing further modificationsf In describing my invention, '1 first refer to the construction shown in Figs. 1 to a. In these views, the numeral 1 designates an appropriate frame which is preferably elevation of the im- Suitably pivoted to the lever 17, preferably sothat the several shafts 13 1922. Serial No. 561,979.

secured in the upper'portion of said frame in any suitable manner, while a plurality of pockets 3 are disposed under said screen to receive the waste material washed through the screen 2. In the present showing, the pockets 3 are of substantially V- shape in section and each pocket is provided with a. movable side 41 which is preferably mountedpivotally as indicated at 5, the several movable sides being suitably connected by a connecting rod-6 which is linked at 7 to an eccentric 8 on a transverse rock shaft 9 mounted at one end of the frame. This rock shaft is provided with a suitable operating lever 10-and any preferred means 11 maybe employed for holding said lever nor- Inally against movement, with the pockets preferably open slightly as shown in Fig. 2. Positioned within the pockets 3, are a number of vertically movable oscillating agitators '12 carried respectively byv rock shafts 13 extending across the frame 1. In the preferred form of construction, each rock shaft 13 is provided with a'dependingcrank arm 14 at the exterior of the frame 1 and the several crank .arms are connected by a longitudinal connecting rod 15," the latter be-' ing pivoted at 16 toa lever 17 which at fulcrumed to one side of said frame 1.

by means of a bolt 19 which may be passed through any one of ainumber of'openings 20 in said lever, is a connecting rod21 or pitman which is preferably adjustable in length, by meansof a turn-buckle or the like 22. The pitman 21 is connected with an eccentric 23 on the'shaft 24 of a water wheel 25, the latter being positioned under the discharge spout 26 which declines from the short bottom 27 with which frame 1 is provided, adjacent its upper end. By this association of parts, the water" flowing throughthe screen 2 onto the bottom 27,-

will discharge fromthe latter through the spout 26, thereby rotating the water-wheel 25, the result beingthat the eccentric 23 causes stroking of the pitman 21and consequent oscillationof the lever 17. This lever in turn reciprocates the connecting rod 15 are rocked to and fro through the instrumentality of the crank armszla, thereby'causing vertical 0s cillation of the agitators 12. This agitation effectively prevents accumulation of waste material in the pockets 3 and if the lever 10 is adjusted in a manner to partially open the movable sides lof said pockets, this waste material will continually wash out under the action of the agitators. It will be understood that the pockets may remain entirely closed if desired and that they may be opened whenever the contents thereof are to be dumped. In all instances, however, clogging of the pockets will be prevented by the continually moving agitators: 12., While it is preferred to operate these agitators from a water wheel such as 25, so that additional expense for. power is unnecessary, it will be understood that the invention is not restricted to this manner of operation. Furthermore, while the sides of the pockets are shown straight, it will understood that this detail is not essential and that said sides may be positioned at any desired angle.

In the form of construction shown in Figs. 5 and 6, the numeral 1 designates the carry ing frame and 2 has reference to the screen. In this form of the invention, the collecting pockets 3 are of substantially semi-cylindrical form and may well be constructed of sheet metal asshown, each pocket. being provided with a movable side 4 pivotally mounted as indicated at 5 A connecting rod 6" operated in the same manner as the connecting rod 6 is pivoted to the movable sides et and may beset so that a slight. gap may be left at the bottom of each pocket if de sired, or the bottoms of the pockets may be entirely closed and the movable sides swung outwardly only at suitable intervals for dumping their contents. In all instances, however, clogging of the pockets is prevented by suitable agitators, each of which preferably comprises a rock shaft 13*,a pair of arms 30 extending rigidly from said rock shaft, an 'arcuate plate 31 extending between and secured to said arms 30, and an upstanding wall 32 also extending between the arms 30 and resting at its lower edge upon the plate 31. The several rock shafts 13 are adapted to be operated in any suitable manner, but the same construction as that above described for operating the shaft is preferably used. The result is that as the shafts 13 are oscillated, the agitators continually sweep across the curved pockets or walls and thereby effectively agitate the waste material and water therein so that it will readily wash out as soon as the pockets are opened suffi ciently.

In the construction shown in Fig. 7, the numerals 32 designate agitators of the same construction as those described in the preceding paragraph, although other structures might well be used. The shape of the pockets 3 however is changed as each pocket is provided with a pair of straightdownwardly converging side walls 33 and with an arcuate bottom 34 whose edges are spaced from the lower edges of the side walls to provide outlet gaps 35 for the waste material and water. The walls 33 and 34 are rigidly secured to the sides of the frame 1 under the screen 2 and it will be seen that in this form of the invention, when the agitators 32* are oscillated by any suitable means such as that above described, the waste material and water will be alternately moved toward opposite sides of the pockets so that a discharge takes place first through one of the gaps 35 of each pocket and then through the other, but in no case can the Waste material lodge in said pockets, due to the effective agitation thereof.

In the construction shown in Fig. 8, the construction is approximately the same as that shown in Fig. 7, with the exception however that the side walls 33, as well as the bottom wall 34: are curved concentrically with the axis of the agitator By providing a construction such as that herein disclosed, it will be seen that I have greatly improved upon the patented device and while the details which I have shown, are preferably followed, it is to be understood that within the scope of the invention as claimed, numerous minor changes may be made.

I claim:

1. A screening machine comprising a frame, a screen therein, a plurality of collecting pockets beneath said screen and having a discharge opening, rock shafts positioned in said pockets respectively, agitators car ried by said rock shafts and having movement towards and away from the discharge opening when in motion, and means for simultaneously oscillating all of said rock shafts.

2. A screening machine comprising a frame, a screen therein, a plurality of. collecting pockets beneath said screen and each having an outlet, rock shafts extending across the frame and positioned in said pockets respectively,

agitators carried by said rock shafts and having movement towards and away from the outlet when in motion, crank arms extending in the same direction from said rock shafts and positioned at the exterior of the frame, a longitudinal connecting rod pivoted to all of said crank arms, and means for reciprocating said connecting rod to produce oscillation of said agitators.

3. A screening machine comprising a frame, a screen therein, a plurality of collecting pockets in the frame beneath said screen, agitators in said pockets, a water wheel associated with said frame and driven by water'supplied to the latter, and operating connections between said water wheel and agitators for operating thelatter from the former.. I

4. A screening machine comprising a fram a screen therein, a plurality of collooting pockets in the frame beneath said 13c screen, agitators in said pockets having rock shafts extending to the exterior ofthe frame, crank arms secured to the rock shafts and extending, in the same direction therefrom, a longitudinal connecting rodpivoted to all of said crank arms, a water wheel associated with the frame and driven by water supplied to the latter, and operating connections between said water wheel and the connecting rod for producing reciprocation of the latter.

5. A screening machine comprising a frame, a screen therein, collectmg pockets inthe frame beneath said screen, agitators in said pockets having rock shafts extending to the exterior of the frame, crank arms on the rock shafts extending in the same direction therefrom, a longitudinal connecting v rod pivoted to all of said crank arms, a lever pivoted toandvextending from said lever, and a water wheel having an eccentric connected with said pitman, said water Wheel being positioned to be operated by water supplied to the screening machine.

6. A screening machine comprising a V frame, a screen therein, pockets in the frame,

beneath said screen,a bottom for the frame located beneath certain of said pockets, a water wheel positioned to" be operated by water running from the end ofsaid bottom, and agitators in, said pockets operated means of said Water wheel.

In testimony whereof. I have my hand.

WILLIAM F. MARTIN.-

hereunto set 

